Component Context Menu

You can put your own functionallity in the context menu of components inspector. This menu is either reachable by a right click on an empty space in an components inspector area or by clicking on the gear icon in the upper right.

using UnityEngine;

public class MyBehaviour: MonoBehaviour
{
    [ContextMenu("Toggle enabled state")]
    public void ToggleEnableState()
    {
        enabled = !enabled;
    }
}

This can be usefull if you want to trigger some gameplay events while being in the Unity editor play mode.